<noframes id="xdfdt">

      <address id="xdfdt"></address>

      <span id="xdfdt"><span id="xdfdt"></span></span>

        考生在線咨詢

        湖南成考網微信公眾號 湖南成考網微信公眾號
        返回頂部∧
          歡迎訪問湖南成考網!本網站為民間交流網站,主要為廣大考生提供報考指導服務,網站信息僅供學習交流使用,官方信息以湖南省教育考試院www.hneao.edu.cn/為準。
        • 咨詢電話:0731-85468015
        城市:
        成考系統:
        所在位置:湖南成考網 > 復習資料 > 專升本 > 正文

        2019年湖南成人高考專升本英語練習試題(五)

        2019-09-28 09:27:52   來源:湖南成考網    點擊: 學習交流群+ 加入 微信公眾號+ 關注
        作者:王老師
          122. It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior. So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of underwater listening devices spanning the oceans. Tracking whales is but one example of all exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies. Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption for the first time and that they plan similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures. The speed of sound in water is roughly one mile a second, slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (聽診器) does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles. [共5題]

          (1) The passage is chiefly about ________.

          (A) an effort to protect an endangered marine species

          (B) the exposure of a US Navy top-secret weapon

          (C) the civilian use of a military detection system

          (D) a new way to look into the behavior of blue whales

          正確答案:C

          (2) The underwater listening system was originally designed ________.

          (A) to monitor deep-sea volcanic eruptions

          (B) to replace the global radio communications network

          (C) to study the movement of ocean currents

          (D) to trace and locate enemy vessels

          正確答案:D

          (3) The deep-sea listening system makes use of ________.

          (A) the unique property of layers of ocean water in transmitting sound

          (B) the capability of sound to travel at hligh speed

          (C) low-frequency sounds travelling across different layers of water

          (D) the sophisticated technology of focusing sounds under water

          正確答案:A

          (4) It can be inferred from the passage that ________.

          (A) blue whales are no longer endangered with the use of the new listening system

          (B) new radio devices should be developed for tracking the endangered blue whales

          (C) military technology has great potential in civilian use

          (D) opinions differ as to whether civilian scientists should be allowed to use military technology

          正確答案:C

          (5) Which of the following is true about the US Navy underwater listening network?

          (A) It has been replaced by a more advanced system.

          (B) It is now partly accessible to civilian scientists.

          (C) It became useless to the military after the cold war.

          (D) It is indispensable in protecting endangered species.

          正確答案:B

          想獲取完整文檔版成考復習資料,可關注下方二維碼回復“備考資料”。

        成考倒計時

        340

        立刻定制專屬提升方案

        獲取方案 OR 點我咨詢 點我關注 點我加群

        湖南成考網申明:

        (一)由于各方面情況的調整與變化本網提供的考試信息僅供參考,敬請以教育考試院及院校官方公布的正式信息為準。

        (二)本網注明信息來源為其他媒體的稿件均為轉載體,免費轉載出于非商業性學習目的,版權歸原作者所有。如有內容與版權問題等請與本站聯系。聯系方式:郵件429504262@qq.com

        未經授權不得轉載,如需轉載請注明出處。

        轉載請注明:文章轉載自 湖南成考網 [http://www.roadweather.com.cn/]
        本文關鍵詞:
        本文地址:http://www.roadweather.com.cn/show-1033-7293-1.html

        上一篇:2019年湖南成人高考專升本英語練習試題(四)
        下一篇:2019年湖南成人高考專升本英語練習試題(六)

        湖南成人高考提升便捷服務

        【考試時間:10月30、31日】

        湖南成人高考報名系統 成績及錄取查詢系統
        距2021全國成人高考:僅剩 340
        【請廣大考生提前備考】